CN113773532A - High-transparency biodegradable heat shrinkable film and preparation method thereof - Google Patents
High-transparency biodegradable heat shrinkable film and preparation method thereof Download PDFInfo
- Publication number
- CN113773532A CN113773532A CN202111000926.7A CN202111000926A CN113773532A CN 113773532 A CN113773532 A CN 113773532A CN 202111000926 A CN202111000926 A CN 202111000926A CN 113773532 A CN113773532 A CN 113773532A
- Authority
- CN
- China
- Prior art keywords
- layer
- biodegradable
- shrinkable film
- heat shrinkable
- transparency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229920006257 Heat-shrinkable film Polymers 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 34
- 238000001125 extrusion Methods 0.000 claims abstract description 27
- 238000010096 film blowing Methods 0.000 claims abstract description 24
- 229920002472 Starch Polymers 0.000 claims abstract description 17
- 239000008107 starch Substances 0.000 claims abstract description 17
- 235000019698 starch Nutrition 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims description 26
- 238000003756 stirring Methods 0.000 claims description 22
- 239000004970 Chain extender Substances 0.000 claims description 13
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 12
- 229920006167 biodegradable resin Polymers 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- -1 polybutylene terephthalate adipate Polymers 0.000 claims description 12
- 239000004014 plasticizer Substances 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 229920000747 poly(lactic acid) Polymers 0.000 claims description 7
- 239000004626 polylactic acid Substances 0.000 claims description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 6
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000005543 nano-size silicon particle Substances 0.000 claims description 4
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 claims description 4
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 claims description 4
- 229920000379 polypropylene carbonate Polymers 0.000 claims description 4
- 235000012239 silicon dioxide Nutrition 0.000 claims description 4
- 238000005469 granulation Methods 0.000 claims description 3
- 230000003179 granulation Effects 0.000 claims description 3
- 229920001610 polycaprolactone Polymers 0.000 claims description 3
- 239000004632 polycaprolactone Substances 0.000 claims description 3
- KAIPKTYOBMEXRR-UHFFFAOYSA-N 1-butyl-3-methyl-2h-imidazole Chemical compound CCCCN1CN(C)C=C1 KAIPKTYOBMEXRR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052736 halogen Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 3
- 229910017053 inorganic salt Inorganic materials 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 43
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 6
- 229920003023 plastic Polymers 0.000 abstract description 5
- 239000004033 plastic Substances 0.000 abstract description 5
- 239000002028 Biomass Substances 0.000 abstract description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 3
- 239000001569 carbon dioxide Substances 0.000 abstract description 3
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000003786 synthesis reaction Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 109
- 238000005303 weighing Methods 0.000 description 4
- IAZSXUOKBPGUMV-UHFFFAOYSA-N 1-butyl-3-methyl-1,2-dihydroimidazol-1-ium;chloride Chemical compound [Cl-].CCCC[NH+]1CN(C)C=C1 IAZSXUOKBPGUMV-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000011846 petroleum-based material Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000012792 core layer Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/22—Layered products comprising a layer of synthetic resin characterised by the use of special additives using plasticisers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/02—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising animal or vegetable substances, e.g. cork, bamboo, starch
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B9/045—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/716—Degradable
- B32B2307/7163—Biodegradable
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2303/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
- C08J2303/02—Starch; Degradation products thereof, e.g. dextrin
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/05—Alcohols; Metal alcoholates
- C08K5/053—Polyhydroxylic alcohols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/20—Carboxylic acid amides
Abstract
The invention belongs to the technical field of plastic synthesis and processing, and particularly provides a high-transparency biodegradable heat-shrinkable film and a preparation method thereof, wherein biomass renewable resource starch which is low in price and wide in source is used as a raw material, and the preparation method provided by the invention enables the film to still keep good transparency after film forming and greatly reduces the cost of the raw material; the high-transparency biodegradable heat shrinkable film prepared by adopting a three-layer co-extrusion film blowing mode has good heat shrinkable performance, can completely refer to the performance of the traditional petrochemical plastic heat shrinkable film at present, and meets the requirements of national standard GB/T13519-2016; in addition, the raw materials used in the invention can be degraded into carbon dioxide and water in natural environment, and have no negative influence on the environment, thus being an environment-friendly material.
Description
Technical Field
The invention belongs to the technical field of plastic synthesis and processing, and particularly relates to a high-transparency biodegradable heat-shrinkable film and a preparation method thereof.
Background
The heat shrinkable film is a special functional film which can shrink after being heated, and is widely used in the packaging of various products due to excellent mechanical properties and good sealing performance so as to facilitate the sale and transportation of the products. At present, most of materials of the heat shrinkable film are traditional petroleum-based materials which are difficult to treat, such as PP, PE, PVC, PET and the like, and have the problem of environmental pollution after being used, and the degradable environment-friendly heat shrinkable film is developed successively along with the continuous improvement of environmental awareness of people. Because the heat shrinkable film also needs to meet the special requirement of transparency, the variety of raw materials which can be used for producing the fully biodegradable heat shrinkable film is very limited, the price is high, the wide-range popularization is not facilitated, and if the cost is reduced by adding the filler, the transparency and the shrinkability of the film are greatly influenced. Therefore, the invention provides a transparent biodegradable heat shrinkable film, which uses starch which is a biomass renewable resource with low price and wide source, can keep the transparency after film forming by a special processing mode, and greatly reduces the cost of raw materials.
Disclosure of Invention
The invention aims to solve the problems that petroleum-based materials are easy to cause pollution and biodegradable materials are high in cost in the prior art.
Therefore, the invention provides a high-transparency biodegradable heat-shrinkable film, which has an A/B/A three-layer structure; wherein the raw materials of the layer A comprise full-biodegradable resin, a chain extender and an opening agent; the raw material of the B layer comprises starch and a plasticizer.
Specifically, the raw materials of the layer A comprise 100 parts by weight of biodegradable resin, 0.01-2 parts by weight of chain extender and 0.5-10 parts by weight of opening agent; the raw materials of the layer B comprise 100 parts of starch and 5-50 parts of plasticizer by mass.
Specifically, the fully biodegradable resin comprises at least one of polylactic acid, polybutylene terephthalate adipate, polycaprolactone and polypropylene carbonate.
Specifically, the opening agent comprises at least one of talcum powder, nano silicon dioxide and oleamide
Specifically, the plasticizer includes at least one of ethylene glycol, glycerol, 1-butyl-3 methylimidazole halogen salts, and 1-butyl-3 methylimidazole inorganic salts.
Specifically, the mass ratio of each layer in the A/B/A three-layer structure is A: b: a is 1: 0.1-1: 1.
the invention also provides a preparation method of the high-transparency biodegradable heat shrinkable film, which comprises the following steps:
1) putting the full-biodegradable resin, the chain extender and the opening agent into high-speed mixing equipment, and stirring and mixing to obtain a layer A mixed material;
2) putting starch and plasticizer into high-speed mixing equipment, stirring and mixing, putting into a double-screw extruder, and extruding and granulating to obtain a B layer material;
3) and (2) putting the mixed material of the layer A into an inner-layer screw rod and an outer-layer screw rod of three-layer co-extrusion film blowing equipment, putting the material of the layer B into a middle-layer screw rod of the three-layer co-extrusion film blowing equipment, and adjusting the quality of each layer through the three-layer co-extrusion film blowing equipment to prepare the high-transparency biodegradable heat shrinkable film with the three-layer structure of A/B/A.
Specifically, the stirring and mixing conditions in the step (2) are 500-.
Specifically, the stirring and mixing conditions in the step (3) are 110-.
Specifically, the extrusion granulation temperature in the step (3) is 110-.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the high-transparency biodegradable heat-shrinkable film provided by the invention uses biomass renewable resource starch which is low in price and wide in source as a raw material, and the preparation method provided by the invention enables the high-transparency biodegradable heat-shrinkable film to still keep good transparency after film forming and greatly reduces the cost of the raw material; the high-transparency biodegradable heat shrinkable film prepared by adopting a three-layer co-extrusion film blowing mode has good heat shrinkable performance, can completely refer to the performance of the traditional petrochemical plastic heat shrinkable film at present, and meets the requirements of national standard GB/T13519-2016; in addition, the raw materials used in the invention can be degraded into carbon dioxide and water in natural environment, and have no negative influence on the environment, thus being an environment-friendly material.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Although representative embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that various modifications and changes may be made thereto without departing from the scope of the invention. Therefore, the scope of the present invention should not be limited to the embodiments, but should be defined by the appended claims and equivalents thereof.
The invention provides a high-transparency biodegradable heat-shrinkable film, which is of an A/B/A three-layer structure; wherein the raw materials of the layer A comprise full-biodegradable resin, auxiliary materials, a chain extender and an opening agent; the raw material of the B layer comprises starch and a plasticizer.
Wherein, the mass ratio of each layer in the A/B/A three-layer structure is A: b: a is 1: 0.1-1: 1; the raw materials of the layer A comprise 100 parts by mass of biodegradable resin, 0.01-2 parts by mass of chain extender and 0.5-10 parts by mass of opening agent; the raw materials of the layer B comprise 100 parts of starch and 5-50 parts of plasticizer by mass.
Specifically, the fully biodegradable resin comprises at least one of polylactic acid, polybutylene terephthalate adipate, polycaprolactone and polypropylene carbonate; the opening agent comprises at least one of talcum powder, nano silicon dioxide and oleamide.
The invention also provides a preparation method of the high-transparency biodegradable heat shrinkable film, which comprises the following steps:
1) putting the full-biodegradable resin, the chain extender and the opening agent into high-speed mixing equipment, and stirring and mixing to obtain a layer A mixed material;
wherein, the stirring and mixing conditions are that the stirring is carried out for 5-15min at the normal temperature of 500-;
2) putting starch and plasticizer into high-speed mixing equipment, stirring and mixing, putting into a double-screw extruder, and extruding and granulating to obtain a B layer material;
specifically, the stirring and mixing conditions are 110-; the extrusion granulation temperature is 110-150 ℃;
3) and (2) putting the mixed material of the layer A into an inner-layer screw rod and an outer-layer screw rod of three-layer co-extrusion film blowing equipment, putting the material of the layer B into a middle-layer screw rod of the three-layer co-extrusion film blowing equipment, and adjusting the quality of each layer through the three-layer co-extrusion film blowing equipment to prepare the high-transparency biodegradable heat shrinkable film with the three-layer structure of A/B/A.
The effect of the highly transparent biodegradable heat shrinkable film of the present invention will be studied by way of specific examples.
Example 1:
the embodiment provides a high-transparency biodegradable heat shrinkable film, which is prepared by the following method:
1) weighing a layer A raw material and a layer B raw material according to the mass parts, wherein the layer A raw material comprises: 70 parts of polylactic acid, 30 parts of polybutylene terephthalate adipate, 1 part of talcum powder and 0.3 part of chain extender; the layer B comprises the following raw materials: 100 parts of starch and 25 parts of glycerol;
2) putting the raw material of the layer A into high-speed mixing equipment, and stirring at the normal temperature of 1000rpm for 5min to obtain a mixed material of the layer A;
3) putting the raw material of the layer B into high-speed mixing equipment, stirring at 115 ℃ and 1500rpm for 10min, putting into a double-screw extruder, and extruding and granulating at 130 ℃ to obtain a layer B material;
4) the mixed material of the layer A is put into the inner and outer layer screws of the three-layer co-extrusion film blowing equipment, the material of the layer B is put into the middle layer screw of the three-layer co-extrusion film blowing equipment, the quality of each layer is adjusted through the three-layer co-extrusion film blowing equipment, and the mass ratio A of each layer is prepared: b: a is 1:0.5: 1.
Example 2:
the embodiment provides a high-transparency biodegradable heat shrinkable film, which is prepared by the following method:
1) weighing a layer A raw material and a layer B raw material according to the mass parts, wherein the layer A raw material comprises: 70 parts of polylactic acid, 30 parts of polybutylene terephthalate adipate, 1 part of talcum powder and 0.3 part of chain extender; the layer B comprises the following raw materials: 100 parts of starch and 25 parts of glycerol;
2) putting the raw material of the layer A into high-speed mixing equipment, and stirring at the normal temperature of 1000rpm for 5min to obtain a mixed material of the layer A;
3) putting the raw material of the layer B into high-speed mixing equipment, stirring at 115 ℃ and 1500rpm for 10min, putting into a double-screw extruder, and extruding and granulating at 130 ℃ to obtain a layer B material;
4) the mixed material of the layer A is put into the inner and outer layer screws of the three-layer co-extrusion film blowing equipment, the material of the layer B is put into the middle layer screw of the three-layer co-extrusion film blowing equipment, the quality of each layer is adjusted through the three-layer co-extrusion film blowing equipment, and the mass ratio A of each layer is prepared: b: a is 1:0.7: 1.
Example 3:
the embodiment provides a high-transparency biodegradable heat shrinkable film, which is prepared by the following method:
1) weighing a layer A raw material and a layer B raw material according to the mass parts, wherein the layer A raw material comprises: 80 parts of polylactic acid, 20 parts of polybutylene terephthalate adipate, 0.8 part of oleamide and 0.5 part of chain extender; the layer B comprises the following raw materials: 100 parts of starch and 15 parts of 1-butyl-3 methylimidazole chloride salt;
2) putting the raw material of the layer A into high-speed mixing equipment, and stirring at the normal temperature of 1000rpm for 5min to obtain a mixed material of the layer A;
3) putting the raw material of the layer B into high-speed mixing equipment, stirring at 115 ℃ and 1500rpm for 10min, putting into a double-screw extruder, and extruding and granulating at 135 ℃ to obtain a layer B material;
4) the mixed material of the layer A is put into the inner and outer layer screws of the three-layer co-extrusion film blowing equipment, the material of the layer B is put into the middle layer screw of the three-layer co-extrusion film blowing equipment, the quality of each layer is adjusted through the three-layer co-extrusion film blowing equipment, and the mass ratio A of each layer is prepared: b: a is 1:0.5: 1.
Example 4:
the embodiment provides a high-transparency biodegradable heat shrinkable film, which is prepared by the following method:
1) weighing a layer A raw material and a layer B raw material according to the mass parts, wherein the layer A raw material comprises: 80 parts of polylactic acid, 20 parts of polypropylene carbonate, 1 part of nano silicon dioxide and 0.3 part of chain extender; the layer B comprises the following raw materials: 100 parts of starch and 10 parts of 1-butyl-3 methylimidazole chloride salt;
2) putting the raw material of the layer A into high-speed mixing equipment, and stirring at the normal temperature of 1000rpm for 5min to obtain a mixed material of the layer A;
3) putting the raw material of the layer B into high-speed mixing equipment, stirring at 110 ℃ and 1500rpm for 10min, putting into a double-screw extruder, and extruding and granulating at 135 ℃ to obtain a layer B material;
4) the mixed material of the layer A is put into the inner and outer layer screws of the three-layer co-extrusion film blowing equipment, the material of the layer B is put into the middle layer screw of the three-layer co-extrusion film blowing equipment, the quality of each layer is adjusted through the three-layer co-extrusion film blowing equipment, and the mass ratio A of each layer is prepared: b: a is 1:0.5: 1.
The performance of the high transparent biodegradable heat shrinkable films provided in examples 1 to 4 was measured and the results are shown in Table 1.
TABLE 1 high transparency biodegradable heat shrinkable film Properties
From table 1, it can be seen that the addition of the B layer of the intermediate core layer does not significantly reduce the transparency and shrinkage of the biodegradable heat shrinkable film, and has excellent mechanical properties, high degradation rate, and environmental protection while completely meeting the use requirements of the heat shrinkable film.
In conclusion, the high-transparency biodegradable heat shrinkable film uses biomass renewable resource starch which is low in price and wide in source as a raw material, and the preparation method provided by the invention enables the high-transparency biodegradable heat shrinkable film to still keep good transparency after film forming and greatly reduces the cost of the raw material; the high-transparency biodegradable heat-shrinkable film prepared by adopting a three-layer co-extrusion film blowing mode has good heat-shrinkable performance, and can replace the conventional petrochemical plastic heat-shrinkable film at present; in addition, the raw materials used in the invention can be degraded into carbon dioxide and water in natural environment, and have no negative influence on the environment, thus being an environment-friendly material.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention.
Claims (10)
1. A high-transparency biodegradable heat-shrinkable film is characterized in that: the high-transparency biodegradable heat shrinkable film layer structure is an A/B/A three-layer structure; wherein the layer A comprises full biodegradable resin, a chain extender and an opening agent; the B layer includes starch and a plasticizer.
2. The highly transparent biodegradable heat shrinkable film of claim 1, wherein: the layer A comprises 100 parts of full-biodegradable resin, 0.01-2 parts of chain extender and 0.5-10 parts of opening agent by mass; the B layer comprises 100 parts of starch and 5-50 parts of plasticizer in parts by mass.
3. The highly transparent biodegradable heat shrinkable film of claim 1, wherein: the fully biodegradable resin comprises at least one of polylactic acid, polybutylene terephthalate adipate, polycaprolactone and polypropylene carbonate.
4. The highly transparent biodegradable heat shrinkable film of claim 1, wherein: the opening agent comprises at least one of talcum powder, nano silicon dioxide and oleamide.
5. The highly transparent biodegradable heat shrinkable film of claim 1, wherein: the plasticizer comprises at least one of ethylene glycol, glycerol, 1-butyl-3 methylimidazole halogen salt and 1-butyl-3 methylimidazole inorganic salt.
6. The highly transparent biodegradable heat shrinkable film of claim 1, wherein: the mass ratio of each layer in the A/B/A three-layer structure is A: b: a is 1: 0.1-1: 1.
7. a method for preparing a high transparent biodegradable heat shrinkable film as claimed in any one of claims 1 to 6, comprising the steps of:
1) putting the full-biodegradable resin, the chain extender and the opening agent into high-speed mixing equipment, and stirring and mixing to obtain a layer A mixed material;
2) putting starch and plasticizer into high-speed mixing equipment, stirring and mixing, putting into a double-screw extruder, and extruding and granulating to obtain a B layer material;
3) and putting the A layer of mixed material into an inner layer screw and an outer layer screw of the three-layer co-extrusion film blowing equipment, putting the B layer of mixed material into a middle layer screw of the three-layer co-extrusion film blowing equipment, and adjusting the quality of each layer by the three-layer co-extrusion film blowing equipment to prepare the high-transparency biodegradable heat shrinkable film with the A/B/A three-layer structure.
8. The method of making a biodegradable seismic charge casing according to claim 7, wherein: the stirring and mixing conditions in the step (2) are 500-2000rpm stirring at normal temperature for 5-15 min.
9. The method of making a biodegradable seismic charge casing according to claim 7, wherein: the stirring and mixing conditions in the step (3) are 110 ℃ and 130 ℃ and 500rpm and 2000rpm for 5-15 min.
10. The method of making a biodegradable seismic charge casing according to claim 7, wherein: the extrusion granulation temperature in the step (3) is 110-150 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111000926.7A CN113773532A (en) | 2021-08-30 | 2021-08-30 | High-transparency biodegradable heat shrinkable film and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111000926.7A CN113773532A (en) | 2021-08-30 | 2021-08-30 | High-transparency biodegradable heat shrinkable film and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113773532A true CN113773532A (en) | 2021-12-10 |
Family
ID=78839852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111000926.7A Pending CN113773532A (en) | 2021-08-30 | 2021-08-30 | High-transparency biodegradable heat shrinkable film and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113773532A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115091832A (en) * | 2022-07-09 | 2022-09-23 | 河南达新源新材料有限公司 | High-transparency polyester heat shrinkable film and preparation method thereof |
| CN115109397A (en) * | 2022-06-24 | 2022-09-27 | 常州博疆新材料科技有限公司 | Full-biodegradable heat shrinkable film and preparation method thereof |
| CN115785636A (en) * | 2023-01-03 | 2023-03-14 | 中化泉州能源科技有限责任公司 | Degradable heat shrinkable film and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105017699A (en) * | 2015-08-06 | 2015-11-04 | 潍坊华潍新材料科技有限公司 | Biology-base degradable stretching film and preparing method thereof |
| CN109367173A (en) * | 2018-08-09 | 2019-02-22 | 束建军 | A kind of plastic bag high biological based fully degradable PP TYPE of low cost and preparation method thereof |
| CN112226050A (en) * | 2020-10-13 | 2021-01-15 | 安徽农业大学 | Biodegradable heat shrinkable film with high transparency, and preparation method and application thereof |
-
2021
- 2021-08-30 CN CN202111000926.7A patent/CN113773532A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105017699A (en) * | 2015-08-06 | 2015-11-04 | 潍坊华潍新材料科技有限公司 | Biology-base degradable stretching film and preparing method thereof |
| CN109367173A (en) * | 2018-08-09 | 2019-02-22 | 束建军 | A kind of plastic bag high biological based fully degradable PP TYPE of low cost and preparation method thereof |
| CN112226050A (en) * | 2020-10-13 | 2021-01-15 | 安徽农业大学 | Biodegradable heat shrinkable film with high transparency, and preparation method and application thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115109397A (en) * | 2022-06-24 | 2022-09-27 | 常州博疆新材料科技有限公司 | Full-biodegradable heat shrinkable film and preparation method thereof |
| CN115091832A (en) * | 2022-07-09 | 2022-09-23 | 河南达新源新材料有限公司 | High-transparency polyester heat shrinkable film and preparation method thereof |
| CN115785636A (en) * | 2023-01-03 | 2023-03-14 | 中化泉州能源科技有限责任公司 | Degradable heat shrinkable film and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113773532A (en) | High-transparency biodegradable heat shrinkable film and preparation method thereof | |
| US10941260B2 (en) | Plasticized biodegradable polyester film and preparation method thereof | |
| CN110760169B (en) | Barrier material and preparation method thereof | |
| CN103160012B (en) | A kind of oxygen barrier and degredation plastic film | |
| CN101607617B (en) | Degradable BOPP packing film and manufacturing method thereof | |
| CN110862598B (en) | 90-DEG C low-shrinkage ultraviolet-proof medium-density polyethylene sheath material and preparation method thereof | |
| US20180016420A1 (en) | Method for producing modified polyester resin reinforced with carbon fiber | |
| CN1868737A (en) | Low cost high efficiency polyethylene conductive film and its preparation method | |
| CN106317568A (en) | Anti-ultraviolet PE heat shrinkable film and preparing method thereof | |
| CN112778723A (en) | Starch-based degradable desorption tube material and preparation method thereof | |
| CN103738015B (en) | A kind of transverse-thermal-sbidirectional bidirectional stretching polyester thin film and preparation method thereof | |
| CN113045881A (en) | Thermal-shrinkage degradable environment-friendly film material and preparation method and application method thereof | |
| CN112175330A (en) | Completely biodegradable plastic film prepared from straws and preparation method thereof | |
| CN114350171A (en) | Full-degradable plastic film and production process thereof | |
| CN101381508B (en) | White biaxial stretching polyester film and production method thereof | |
| CN108707286B (en) | Weather-resistant polyolefin pipe and preparation method thereof | |
| CN103483664A (en) | Degradable plastic film | |
| CN111518352A (en) | High-temperature water-soluble PVA master batch composition and high-temperature water-soluble PVA particles | |
| CN106398133A (en) | Antistatic PET heat shrinkable film and preparation method thereof | |
| CN106009185A (en) | PE (Poly Ethylene) heat shrink film and preparation method thereof | |
| CN104497398A (en) | Biodegradable plastic film | |
| CN110194860A (en) | A kind of PE heat shrink films and preparation method thereof | |
| CN101885874A (en) | Method for producing silver-gray, anti-ultraviolet and weather-resistant polyethylene overhead insulating material | |
| CN114407471A (en) | Three-layer co-extrusion biodegradable automatic packaging film material and manufacturing method thereof | |
| CN107955242A (en) | A kind of preparation method of oxygen barrier and degradable plastic film |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211210 |